Spine for 190 el grande grizzly

[Ratatat]

Got a question.  I shoot a 58@28 Mon River Possum Stick.  2018's cut to 29 BOP fly good with 125 Grizzlies, but I want to try the el grandes.  How much will the extra 65 grains affect the spine of the arrow?  Any info would be great.

[rbbhunt]

You might check the Easton web site or Kelly's arrows (a sponser here)

[Curtiss Cardinal]

Try them and see for yourself.I was shocked to discover that I could shoot 2020s out of a 64@29" longbow with 250 grain points up front (not counting inserts) with no ill effects at hunting distances, 30 yards and less.

[NorthShoreLB]

Never know until you try, if it gets to week you can always cut the shaft a bit

[adirondack46r]

Originally posted by Ratatat:
...How much will the extra 65 grains affect the spine of the arrow?...

Of course your setup will vary, but here is a data point for you. I have been tuning carbons over the last couple of months. I recently had cut an arrow down to 29.5", put in a 50 grain brass insert, and screwed in a 125 grain field tip. I got bareshaft results indicating the arrow was decidedly too stiff. So I screwed in a 145 grain field top and the bareshaft result indication was the shaft was a tad weak.

20 grains took my setup from decidedly too stiff, to a tad weak. It doesn't take much to affect the spine for carbons. I don't have as much experience with aluminum but 65 grains seems to me like it would have a pretty significant impact.

Again, just a data point.

[Seeking Trad Deer]

I think you will be fine.  I shoot a recurve with 29 1/2" 2018 arrows for my 28 1/2" draw out of a 57# bow bow with 225 grains up front.  Beyone that I get flight problems due to jumping over 18% foc.  But this set up works and flys great.

[Seeking Trad Deer]

PS  I find carbons to have a very limited tuning range.  I can get away with a lot more with aluminums and still have great flight.

[SlowBowinMO]

The proof will be in the shooting, but I'd guess at most a half inch off your 2018's would bring them in, maybe less.  You can also build out your side plate a tiny bit and maybe not cut at all.  They might shoot fine for you the way they are, I doubt it but I would certainly try before changing anything.

[JimmyC]

In my experience 65 grains WILL make your spine noticeably weaker (assuming you bare shaft, see the A & H Archery web page which is a sponser here), certainly enough to re-tune and make a a quick adjustment.  Remember, it may be as simple as adjusting brace height or building out your shelf a bit, etc.  Certainly worth going through the motions to get those bad boys flying straight!  Good luck,


Jim

[Hot Hap]

Don't they have an El Grande that is 150 gr. I think it is the same size, just a different weight. Hap

[SlowBowinMO]

Good point, there is an El Grande 150 that is just as wicked as the 190, just a tad thinner than the 190 but still plenty strong.

Most of my personal Grizzly use is 1) 125's and 2) 150 El Grandes but I don't get to hunt REALLY BIG STUFF either LOL!

[Ratatat]

Thanks a ton for all the input.  I think I'll give them a try and see what happens.  I hunt whitetails here in Southwest PA and that's about it, so maybe it's a little overkill but what the hay.